NenaDelBarrioF109 NenaDelBarrioF109

12-10-2017
Mathematics

contestada

Suppose you have a cache of radium, which has a half-life of approximately 1590 years. how long would you have to wait for 1/5 of it to disappear?

Respuesta :

Kalahira Kalahira

21-10-2017

You would have to wait 318 years for 1/5 (20%) of the Radium to disappear. 1590 is the point where half of the Radium would decay, so if you take 20% of that, it would equate out to 318 years. Radium has a long half life!

Answer Link

Otras preguntas

Urgent please help! Which graph best represents a counterclockwise 180 rotation from the origin from of the figure below?

Read this excerpt from The Riddle of the Rosetta Stone by James Cross Giblin. A few experts challenged Champollion's methods and clung to the notion that the hi

Anderson uses the discriminant to correctly find the number of real solutions of the quadratic equation x2 + 4x + 8 = 0. Which explanation could Anderson provid

Industrial chemicals are stored in 55-gallon drums. The radius of the drum is 12 inches, and the height is 32 inches. Determine the surface area of the drum.

Find the point-slope equation for the line that passes through the points (9, -9) and (-2, 13). Use the first point in your equation.

If p(x) = 2x2 – 4x and q(x) = x – 3, what is (p circle q) (x)?

what is a good reashrch question on water evaporating and salt staying

Find the median for the data set: 6, 56, 50, 172, 151, 137, 180, 66, and 172.

5)-What is 40% of 1256?

Which is not an example of matter and energy cycling through living things? A. Grass giving off oxygen B. Grass growing C. A rock resting on the ground a D. Cow